xterm command line arg compatibility isn't a goal; gnome-terminal is compatible
with itself (more or less) going back a few years, and it would be bad to break
that.
From gnome-terminal --help:
-e, --command=STRING Execute the argument to this
option inside the terminal.
-x, --execute Execute the remainder of the
command line inside the
terminal.
The options behave as specified there, -x does what you are expecting.
gnome-terminal doesn't have a -T option, it has -t and --title instead.

Note

You need to
log in
before you can comment on or make changes to this bug.